linux-kernel - [PATCH ath-next v2 2/2] wifi: ath12k: Use scan link ID 15 for all scan operations

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Message-Id: <20250411-fix_scan_vdev_handling-v2-2-b6740896c144@oss.qualcomm.com>
Date: Fri, 11 Apr 2025 08:46:52 +0530
From: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
To: Jeff Johnson <jjohnson@...nel.org>
Cc: ath12k@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org,
        Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
Subject: [PATCH ath-next v2 2/2] wifi: ath12k: Use scan link ID 15 for all
 scan operations

According to the code documentation in ath12k_mac_op_hw_scan(), "if no
links of an ML VIF are already active on the radio corresponding to the
given scan frequency, the scan link (link ID 15) should be used". This rule
should apply to non-ML interfaces as well to maintain uniformity across the
driver. However, currently, link 0 is selected as the scan link during
non-ML operations.

Update the code to use scan link ID 15 in all cases.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
---
 drivers/net/wireless/ath/ath12k/mac.c | 22 +++++++---------------
 1 file changed, 7 insertions(+), 15 deletions(-)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 4b3469380fb46a629fad7a9a40a44e761ef33fa5..7d96052bb0ccb1230ac446ffbfd20c5f6a463b5a 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -3463,23 +3463,15 @@ static struct ath12k_link_vif *ath12k_mac_assign_link_vif(struct ath12k_hw *ah,
 	if (arvif)
 		return arvif;
 
-	if (!vif->valid_links) {
-		/* Use deflink for Non-ML VIFs and mark the link id as 0
-		 */
-		link_id = 0;
+	/* If this is the first link arvif being created for an ML VIF
+	 * use the preallocated deflink memory except for scan arvifs
+	 */
+	if (!ahvif->links_map && link_id != ATH12K_DEFAULT_SCAN_LINK) {
 		arvif = &ahvif->deflink;
 	} else {
-		/* If this is the first link arvif being created for an ML VIF
-		 * use the preallocated deflink memory except for scan arvifs
-		 */
-		if (!ahvif->links_map && link_id != ATH12K_DEFAULT_SCAN_LINK) {
-			arvif = &ahvif->deflink;
-		} else {
-			arvif = (struct ath12k_link_vif *)
-			kzalloc(sizeof(struct ath12k_link_vif), GFP_KERNEL);
-			if (!arvif)
-				return NULL;
-		}
+		arvif = kzalloc(sizeof(*arvif), GFP_KERNEL);
+		if (!arvif)
+			return NULL;
 	}
 
 	ath12k_mac_init_arvif(ahvif, arvif, link_id);

-- 
2.34.1